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(a) What type of lens is shown in the diagram on the right? What will happen to the parallel rays of light? Show by completing the ray diagram.
(b) Your eye contains a convex lens. Why is it unwise to look at the sun?"
(a) It's a convex lens. The parallel rays of light will converge at a point called the focus of the lens.
(b) It is unwise to look at the sun because our eyes contain a convex lens that converges or focuses a lot of sun rays at a point called the focus and due to this, our eye may get damaged.
Explanation
Converging Lens or Convex Lens $-$ It is a lens that possesses at least one surface that curves outwards. In other words, it is thick across the middle and thin at the upper and lower edges., because of which the light that enters the lens, gets focused, or converged. Due to this effect, it is also known as a positive lens or a converging lens.
The image formed by a convex lens is both real and virtual depending on the position of the object, which means both diminished and magnified images can be produced.
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